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1,2,4‐Triazines VIII . The synthesis of 1,2,4‐triazino[2,3‐e]pyrazolo[1,5‐a]‐1,3,5‐triazines and 1,2,4‐triazino[4,3‐e]pyrazolo[],5‐a] ‐1,3,5‐triaziness
Author(s) -
Lalezari Iradj
Publication year - 1976
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570130621
Subject(s) - chemistry , yield (engineering) , medicinal chemistry , stereochemistry , thermodynamics , physics
Substituted 2,5‐dihydro‐3[3‐methyI(or phenyl)‐5‐aminopyrazolyl]‐1,2,4‐triazin‐5‐ones reacted with orthoesters to yield exclusively 1,2,4‐triazino[2,3‐e]pyrazolo[1,5‐a]‐1,3,5‐triazin‐5‐ones. The structure elucidation was supported by independent synthesis of the isomeric 1,2,3‐triazino‐[4,3‐e]pyrazolo[1,5‐α]‐1,3,5‐triazin‐7‐one as well as by spectroscopical methods.